Preferred Label : photon exitance;
Detailed label : photon exitance, Mp;
IUPAC definition : Photon flux, number basis, qp, u emitted /u by an element of the surface containing
the source point under consideration divided by the area S of that element. SI unit
is s-1 m-2.;
Scope note : this quantity can be expressed on a chemical amount basis by dividing mp by the avogadro
constant. in this case the symbol is mn,p, the name photon exitance, amount basis,
si unit is mol s-1 m-2; common unit is einstein s-1 m-2.; formerly called photon emittance.; mathematical definition: qp s. if qpis constant over the surface area considered,
mp qp s .;
Origin ID : P04631;
See also
Photon flux, number basis, qp, u emitted /u by an element of the surface containing
the source point under consideration divided by the area S of that element. SI unit
is s-1 m-2.
